/*
 * FileAsMsg plug-in for Miranda IM and QIP Infium.
 * Sending/receiving files via instant messaging without protocol support.
 * Homepage: http://code.google.com/p/fileasmsg/
 *
 * Copyright (c) 2008, Radist <radist.nt@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Name(s) of contributor(s) may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Radist ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Radist BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __FILEASMESSAGE_TRANSFER_SESSION__H__R___
#define __FILEASMESSAGE_TRANSFER_SESSION__H__R___

#include "TransferWnd.h"
#include "TransferFile.h"
#include "threads.h"
#include <memory>

typedef enum
{
	FAMMSG_BLOCK,	//  -->
	FAMMSG_ABORT,	// <-->
	FAMMSG_FILE,	//  -->  filename.ext?flags,filesize,blocksize
	FAMMSG_ACCEPT,	// <--
	FAMMSG_REFUSE,	// <--
	FAMMSG_SENT,	//  -->
	FAMMSG_RESEND,	// <--  block1,block2,block3,[...]
	FAMMSG_FINISH,	// <--
	FAMMSG_INVALID
} FAMMSG;

typedef enum
{
	FAMFLAGS_MIN = 0,//name is temporary
	FAMFLAGS_MAX
	//this should be kept according to the FAM_FLAGS_MAP
};

typedef struct
{
	FAMMSG type;
	DWORD flags;
	size_t cbBlob;
	char *pBlob;
} FAMMSGINFO;

class TransferSession;

class TransferTimeoutTimer
	: public Timer
{
	TransferSession *sess;
protected:
	virtual void Tick(void);
public:
	TransferTimeoutTimer( TransferSession *ts );
	virtual ~TransferTimeoutTimer();
};

class TransferSession
{
	volatile HANDLE AwaitingAckProcess;
	TransferTimeoutTimer tmr;
	DWORD error_cnt;
	friend class TransferTimeoutTimer;
	TransferSession(void);
	TransferSession(TransferSession&);
protected:
	HANDLE hContact;
	std::auto_ptr<TransferFile> File;
	std::auto_ptr<TransferWnd> Window;
	void MsgSend(const char*, bool WaitAck = true, bool Utf8 = false);
	virtual void ProcessSent(bool timedout)=0;
	friend class TransferWnd;
public:
	static DWORD send_timeout;
	static DWORD max_error_cnt;
	TransferSession(HANDLE h_Contact, wchar_t *filename, DWORD flags, int filesize = 0, int chunksize = 0);
	virtual ~TransferSession(void)=0;
	virtual void ProcessMsg(FAMMSGINFO &dbe)=0;
	virtual void EndTransfer(bool success = false)=0;
	bool ProcessAck(HANDLE Process, bool Success);
	HANDLE Contact(void){return hContact;}
};

#endif//__FILEASMESSAGE_TRANSFER_SESSION__H__R___
